Area and Circumference of Circles

Calculate the area of Circle 4:

• 380.1 cm squared

• 430.2 cm squared

• 321.8 cm squared

Calculate the area of Circle 5

• 334.9 cm squared

• 314.2 cm squared

• 658.1 cm squared

Calculate the area of Circle 6

• 153.9 cm squared

• 198.0 cm squared

• 327.3 cm squared

Calculate the area of circle 1:

• 11.6 cm squared

• 12.6 cm squared

• 13.6 cm squared

A circular mirror has a 2 inch frame around it. The mirror itself is 8 inches in diameter. What is the area of the frame? Use 3.14 for pi.

Find the area of the quarter circle. Round you answer to the nearest hundredth.

• 58.88

• 78.50

• 7.85

• 157.00

What is the Area Formula for a Circle?

• A = $\pi$ * r * r

• A = $\pi$ * d

• A = 2 * $\pi$ * r

Match the following

• circumference of a circle

• Arc Length

• Sector Area

• Area of a Circle

Match the following definitions to the terms:

• The distance around a circle

• Circumference of a circle

• How much space a circle takes up

• Area of a circle

• square units (units²)

• Units of area

• feet, cm, inches

• Units of circumference

Mark has a circlular fire pit with a diameter of 5 feet

* Build a brick border around the pit.

* Find the area of pit.

Complete the statements about Mark's circular pit.

​ ​

To build the border, Mark needs a minimum of feet​ (a)  

The area of the pit, to the nearest square foot is ​ (b)  

• 16

• 20 sq ft

• 7

• 8

• 9

• 15

• 8 sq ft

• 79 sq ft

• 314 sq ft